OK, my laptop runs on Windows 7 64-bit and it meets the minimum requirements.
EA is always a tad little bit optimistic with their minimum specs for the game. And also, they only publish those for the base game + 1 EP, which is always less intensive for a computer than base game + a collection of EP, SP and store content.
So, "just" meeting the minimum specs will let you "just" run the game, but with all kinds of problems like lagging. You need to exceed those specs, and the more EP/SP you have, the more you need to exceed them.
If you post your complete specs (CPU, RAM, graphic card, EP/SP, mods or not?, how are you patched?), that could help to see if this is indeed enough.